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From: Robert Watson <rwatson@FreeBSD.org>
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To: "Bradley W. Dutton" <brad-fbsd-stable@duttonbros.com>
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Cc: pjd@FreeBSD.org, freebsd-stable@freebsd.org
Subject: Re: graid3 rebuild panic: mb_dtor_pack: ext_size != MCLBYTES
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On Thu, 6 Jul 2006, Bradley W. Dutton wrote:

> I get the below panic when rebuilding a graid3 array. Is this indicative of 
> a hardware or software problem? Or is some of the data on my array corrupt 
> and I should just rebuild the array? I searched on google and didn't find 
> much.
>
> panic: mb_dtor_pack: ext_size != MCLBYTES

As I can't ever remember seeing that panic before, which is compatible with 
google's conclusion, it's likely this is a sign of kernel memory corruption. 
Whether that is a result of a hardware problem, I can't say.  Is this 
reproduceable?  If so, it could be a graid3 memory corruption problem.  I've 
CC'd Pawel, the author of graid3.

Robert N M Watson
Computer Laboratory
University of Cambridge